This - Kaishi

…Daikokuten, as the god of the kitchen, was seen holding a large bag, and was syncretized with Okuninushi, and was widely accepted by the people as an agricultural god. Hotei was a real Zen monk named Kaisi from the Later Liang Dynasty, and was probably added to the list of gods of fortune because of his appearance of perfect fortune. Ebisu is the chief deity of Nishinomiya and is also known as Kotoshironushi, or it is said that he was a Hiruko who washed ashore from the sea and was worshiped. …

*Some of the terminology explanations that mention "Keiko" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…大黒天は厨（くりや）の神として大きな袋を持つ姿から，大国主神とも習合し，農業神として広く民間に受容された。布袋は後梁の実在の禅僧契此（かいし）であるが，福徳円満の姿から福神に加えられたのであろう。えびす神は西宮の主神で事代主（ことしろぬし）神ともされ，あるいは蛭子（ひるこ）が海から漂着してまつられたものともされる。…

※「契此」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報